I see this is the 11th question you've asked in the space of just a few hours. ) We are volunteers here with limited resources, so please don't take unfair advantage of EF's free Q&A service.
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I see this is the 11th question you've asked in the space of just a few hours. (One very few minutes!)
We are volunteers here with limited resources, so please don't take unfair advantage of EF's free Q&A service.
Keep one's head down = stay out of trouble or avoid doing risky activities.
https://en.wiktionary.org/wiki/keep_one%27s_head_down